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A collection of Popup Window Show Actions is populated by the Actions that are registered as start-up Actions in modules used by the application. For instance, the ChangePasswordOnLogon represents a start-up Action. A pop-up window is displayed for each Action after an end-user has executed or canceled the previous Action.

To register an Action as a start-up, override the GetStartupActions method in your module class. Return a list of Popup Window Show Actions in this method.

Main window is shown

The application object asks its Show View Strategy (see ShowViewStrategyBase) to show a main window. Since, at this moment, the Show View Strategy is requested for the first time, it has not yet been created. So, an instance of the ShowInMultipleWindowsStrategy class is created, and then its ShowStartupWindow method is called. (See Show the Main Window in Windows Forms Applications.)